First week would be training and housekeeping stuff. After that you’re pretty much at your client’s location all the time (rarely was I in the EY office downtown throughout the internship). Lots of actual audit work but also lots of fun times. You’ll never be bored. Start and end time varies slightly depending on the clients and the team you’re assigned to (some teams like to start early).
This is another tough question, because no two days are alike, and no two intern experiences are alike, and every office has different clients. For me, I spent most of June at the office, with little actual work to do. The senior on my engagement would give me small tasks here and there, but nothing that extended beyond that day. I told the managers that made the teams I would be more than happy to go help out another team if need be, and the next day I was going out to a client on a 6/30 year end. My senior also trusted me to go out to a client warehouse for an inventory count. So no two days are similar which is why I loved it because everyday I was doing something new.